I've tried to reburn the hidkeys with a parallel programmer but the situation didn't change.
Can someone please tell me which values should i put in the hfuse lfuse and efuse? I'm not very sure i did it right...

Did you get this to work ? The only app I can get working on my 168 chips is the USBasp bootloader. Nothings else I have tried (c64key, yake) will work. I know the hardware is right as the bootloader runs. Is the 168 really that different ?